Wikileaks reports that it is currently mirrored on 1334 sites. Anon is currently up at http://twitter.com/anon_operationn (with 2 'n's in at the end).
According to various reports, PayPal is under attack, the site loads, but is very slow. Some people report that PayPal payments on Ebay are not working.
http://operationn.tk/ (http://213.251.145.96/ is up too.